Technical Description; Application Range - Siemens SITRANS TW 7NG3242 Betriebsanleitung

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Technical Description

1.1

Application Range

The SITRANS TW 4-wire mounting rail device is a transmitter with universal input
circuit for connecting to the following sensors and signal sources.
• Resistance thermometers
• Thermocouples
• Resistance transmitters/potentiometers
•
mV transmitter
• As special version:
- V-transmitters
- Current sources
WARNING
The SITRANS TW, 4-wire mounting rail transmitter is a control stand instrument. It
may only be mounted as an integrated component outside the hazardous area.
The transmitters with "intrinsically safe type of protection" have EC test certification
and comply with the appropriate harmonized European standards of the
CENELEC. They can be used for measuring process variables in areas where
there is a potential gas explosion hazard (zone 1, 0). Measuring of process
variables in zone 0 is only permitted if the sensors are also approved for zone 0.
The transmitter may also be used for zone 20 and 21 areas where there is a
potential dust explosion hazard. In these cases the devices which are connected
to this circuit must meet the requirements of category 1D or 2D and be certified
accordingly.
SITRANS TW
A5E00054075-05
Technical Description
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